A simple‚ rapid‚ specific and highly sensitive spectrofluorimetric method has been developed for the quantification of dabigatran etexilate mesylate (DAB) in bulk and capsule dosage form. A linear relationship was found between fluorescence intensity and DAB concentration in the range of 0.01-1.0 μg/ml in DMSO as solvent at an emission wavelength of 391 nm after excitation at 334 nm‚ with a good correlation coefficient (0.989). The detection and quantification limits were found to be 0.005 and 0
Premium Chemistry Oxygen Solvent
containing a single reference compound. The composition of the unknown mixture and two single unknowns were determined by spotting the reference compounds and the unknown compounds on two TLC plates. Placed them in a developing chamber that contained 0.5% acetic acid in ethyl acetate solvent and observed the TLC plates under UV light after the TLC plates were taken out of the developing chamber. The known reference compounds portrayed spots and calculated Rf values that the unknown compounds matched to. This
Premium Thin layer chromatography Acetic acid
SCH 4U1 FINAL EXAM REVIEW ATOMIC STRUCTURE AND MOLECULAR ARCHITECTURE 1. Describe the wave mechanical model of the atom. 2. Write the ground state electron configuration for Br. 3. Explain why the first ionization energy for Ne is significantly greater than Na. 4. Distinguish between ionization energy and electronegativity. 5. How does VSEPR Theory account for the fact that the bond angle in H2O is less than NH3? 6. Which of the following molecules are polar? Include diagrams
Premium Acetic acid PH Acid dissociation constant
maximum methanol content of 0.10%‚ and a maximum water content of 0.05%. In many applications‚ Eastman methyl acetate can be an effective replacement for acetone and other fast-evaporating solvents. Strength—assay Methanol Water Acidity as acetic acid Color‚ PCS Some common cleaning applications include: • Universal cleaner • Low-VOC and environmental cleaners • Aerosol carburetor cleaners • Paint gun cleaners • Cleaners for printing inks Table 1 Sales specifications
Free Solvent Acetic acid Ethanol
Here is cbse 2007 question paper of science: CBSE X SCIENCE AND TECHNOLOGY (Theory) 2007 (OUTSIDE DELHI) Time allowed: 2 hours 15 mins; Maximum Marks: 100 General Instructions: | 1) | The question paper comprises of two sections A and B. You are to attempt both sections. | 2) | You are advised to attempt all the questions of Section A and Section B separately. | 3) | All questions are compulsory. | 4) | There is no overall choice. However‚ internal choice has been provided in some questions
Premium Sulfuric acid Acetic acid Chlorine
Extraction (Ch # 07) Faraz Gohar Mr. Wayne Xie Chem 201 10/02/2012 Objectives : 1)To purify samples of organic compounds that are solids at room temperature. 2)To dissociate the impure sample in the minimum amount of an appropriate hot solvent Chemical Index : Naphthalene; mp 82 *C 1‚4-Dichlorobenzene; mp 56 *C 4-Chloroaniline; mp 68 - 71 *C; pKb 4.15 Ethyl 4-Aminobenzoate; mp 90 *C; pKb 4.92 Procedure :
Premium Solvent Solubility Acetic acid
- | - | - | - | 50 | Fmoc-Gly-Phe-OMe‚ C27H26N2O5 | 0.46 | 458.52 | 0.001 | - | - | 1 M ethanolic sodium hydroxide | - | - | - | - | 5 | Acetic acid | 0.52 | 60.05 | 0.009 | 1.049 | 0.5 | Table of hazard assessment : Thionyl chloride‚ SOCl2 | * Reacts violently with water * Harmful by inhalation and if swallowed * Contacts with water liberates
Premium Chemistry Chemical reaction Oxygen
Ka‚ Acid Dissociation Constant and Kb‚ Base Dissociation Constant (Lesson Recap) Ka‚ Acid Dissociation Constant Ka- is the Keq for the dissociation for a weak acid. e.g Acetic Acid‚ when dissolved in H2O CH3COOH (aq) + H2O (l) (ACID) (BASE) CH3COO (aq) + H3O(l) (CONJ BASE) (CONJ ACID) CH3COOH (aq) + H2O(l) ↔ CH3COO (aq) + H3O(l) *ONLY weak acid and back can be reversible Equation for Ka : Keq= [CH3COO(aq)] [H3O(l)][CH3COOH(aq)] [H2O(l)] Keq x [H2O
Premium Acid dissociation constant PH Acetic acid
Asymmetric Epoxidation of Dihydronaphthalene with a Synthesized Jacobsen’s Catalyst Justin Lindsey 12/08/96 Chem 250 GG Professor Tim Hoyt TA: Andrea Egans Abstract. 1‚2 diaminocyclohexane was reacted with L-(+)-tartaric acid to yield (R‚R)-1‚2-diaminocyclohexane mono-(+)-tartrate salt. The tartrate salt was then reacted with potassium carbonate and 3‚5-di-tert-butylsalicylaldehyde to yield (R‚R)-N‚N’-Bis(3‚5-di-tert-butylsalicylidene)-1‚2-cyclohexanediamine‚ which was then reacted with Mn(OAc)2*4H2O
Premium Acetic acid Solvent Chromatography
Swimmers ear: Infection of the skin covering the outer ear canal that leads in to the ear drum‚ usually due to bacteria such as streptococcus‚ staphylococcus‚ or pseudomonas. Swimmer’s Ear Symptoms • The most common symptom of swimmer’s ear is pain. Pain gradually begins over a day or two. The pain almost always involves only one ear. The pain is especially intense when the ear is touched or pulled. • The ear canal may itch. • The outer ear may be red‚ and in severe cases the ear
Premium Ear Bacteria Acetic acid